KR20040056132A - Filter Using Carbon Nano Tubes - Google Patents
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- KR20040056132A KR20040056132A KR1020020082683A KR20020082683A KR20040056132A KR 20040056132 A KR20040056132 A KR 20040056132A KR 1020020082683 A KR1020020082683 A KR 1020020082683A KR 20020082683 A KR20020082683 A KR 20020082683A KR 20040056132 A KR20040056132 A KR 20040056132A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/087—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
- B01J19/088—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
- B01J19/121—Coherent waves, e.g. laser beams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/158—Carbon nanotubes
- C01B32/16—Preparation
- C01B32/162—Preparation characterised by catalysts
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- C—CHEMISTRY; METALLURGY
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/158—Carbon nanotubes
- C01B32/168—After-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J2219/0803—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
- B01J2219/0805—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
- B01J2219/0807—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges involving electrodes
- B01J2219/0824—Details relating to the shape of the electrodes
- B01J2219/0826—Details relating to the shape of the electrodes essentially linear
- B01J2219/083—Details relating to the shape of the electrodes essentially linear cylindrical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J2219/0803—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
- B01J2219/0805—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
- B01J2219/0807—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges involving electrodes
- B01J2219/0837—Details relating to the material of the electrodes
- B01J2219/0839—Carbon
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2202/00—Structure or properties of carbon nanotubes
- C01B2202/02—Single-walled nanotubes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2202/00—Structure or properties of carbon nanotubes
- C01B2202/06—Multi-walled nanotubes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/05—Methods of making filter
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
Abstract
Description
본 발명은 공조기의 필터에 관한 것으로서, 더욱 상세하게는 탄소 나노 튜브를 포함하고, 탄소 나노 튜브에는 적어도 한 종류 이상의 나노 사이즈 금속 입자가고착되어 있는 필터에 관한 것이다.The present invention relates to a filter for an air conditioner, and more particularly, to a filter including carbon nanotubes, and at least one type of nano-size metal particles fixed to the carbon nanotubes.
일반적으로 인간은 80% 이상의 시간을 실내에서 보낸다고 한다. 대부분의 실내공기는 담배연기, 악취, 세균 또는 기타 유해한 물질들로 오염되어 있고 이로 인해 인체에 좋지 않은 영향을 미치고 있다. 따라서 실내 공기 정화의 중요성이 날로 인식되기 시작했고 이에 대한 연구와 상품화가 이루어지고 있는 실정이다.In general, humans spend more than 80% of their time indoors. Most indoor air is contaminated with tobacco smoke, odors, bacteria or other harmful substances, which has an adverse effect on the human body. Therefore, the importance of indoor air purification has begun to be recognized day by day, the research and commercialization of this is being done.
그리하여 종래부터 실내 등의 공기 정화를 위하여, 에어컨이나 공기청정기 등을 가정에 설치하였다. 이러한 공조기에는 실내에 부유하는 먼지들을 흡입하여 집진시키기 위한 집진필터가 필수적으로 장착된다.Thus, conventionally, an air conditioner or an air purifier has been installed in a home for the purpose of purifying air in a room. Such an air conditioner is essentially equipped with a dust collecting filter for collecting and collecting dust floating in the room.
한편 도1에 도시한 바와 같이 공조기 내에 집진용 여과지 필터와 함께 탈취필터를 설치하여, 먼지 및 분진 등의 제거와 함께 NH3, HCL, HF 등의 가스, 유기가스, NOX나 SOX가스 등의 화학 오염 물질을 흡착, 제거하여 왔다.Meanwhile, as shown in FIG. 1, a deodorization filter is installed in the air conditioner together with the filter paper filter for dust collection, and the removal of dust and dust, gas such as NH 3 , HCL and HF, organic gas, NO X , SO X gas, etc. Adsorption and removal of chemical pollutants.
이러한 탈취필터에는, 활성탄, 탄소 섬유 또는 이온 교환 수지 등이 이용되고 있다. 또한 이러한 필터는 화학적으로 수식되어 그 용도에 적합하도록 제조되기도 한다.Activated carbon, carbon fiber, ion exchange resin, or the like is used for such a deodorizing filter. These filters are also chemically modified and manufactured to suit their purpose.
그러나 이러한 탈취필터의 흡착 성능은 필터의 표면적에 의하여 정해지는데,시장에서 입수 가능한 상기의 활성탄, 탄소 섬유 또는 이온 교환 수지는 그 표면적이 최대 103m2/g 정도에 불과할 뿐이다.However, the adsorption performance of the deodorizing filter is determined by the surface area of the filter. The activated carbon, carbon fiber or ion exchange resin available on the market has only a surface area of only about 10 3 m 2 / g.
활성탄은 최대 표면적이 103m2/g이므로, 농도 10ppb, 풍속 0.3m/s의 조건의 NH3가스의 제거를 위해서는 필터 두께 100mm 정도가 필요하게 된다. 또한 활성탄 대용으로 사용되는 탄소 섬유 또는 이온 교환 수지의 경우에는 동일한 조건에서 150mm 정도의 필터두께가 필요하게 된다. 이에 따라 공조기가 실내 등에서 차지하는 부피가 커지게 되는 문제점이 있다.Since activated carbon has a maximum surface area of 10 3 m 2 / g, a filter thickness of about 100 mm is required to remove NH 3 gas having a concentration of 10 ppb and a wind speed of 0.3 m / s. In addition, in the case of carbon fiber or ion exchange resin used in place of activated carbon, a filter thickness of about 150 mm is required under the same conditions. Accordingly, there is a problem that the air conditioner occupies a large volume in the room.
또한 활성탄은 활성탄의 물리적 흡착성을 이용하여 탈취 기능을 하는데, 이러한 활성탄 필터는 일정량 이상의 흡착 후에는 더 이상 흡착을 하지 못하고 그대로 냄새 성분 등을 방출하게 되는 문제점이 있다.In addition, the activated carbon has a deodorizing function by using the physical adsorption of the activated carbon, the activated carbon filter has a problem in that it can no longer be adsorbed after the adsorption more than a certain amount as it emits the odor component.
한편 이와 같은 종래의 공조기에는 전술한 바와 같이, 집진필터와 탈취필터가 각각 별도로 설치되어 있으므로 인해 이중의 설치비가 요구되고, 필터 유지 및 관리가 어렵게 된다.On the other hand, in the conventional air conditioner, as described above, since the dust collecting filter and the deodorizing filter are separately installed, a double installation cost is required, and the filter maintenance and management becomes difficult.
아울러 각종유기물질이 발생하는 공정의 산업현장 또는 신축 건물 등과 같이In addition, such as industrial sites or new buildings of processes that generate various organic substances
환경이 열악한 경우, 단순한 탈취필터로서 해결되지 않는 악취로 야기되는 문제는 매우 심각하다. 사람이 악취 또는 VOCs(휘발성 유기화합 물질: 방향족화합물, 알코올 류, 탄화수소류, 유기산류, 케톤류, 알데히드류 등을 말한다)에 접촉을 하는 경우, 미약한 두통으로부터 심하게는 중추신경의 장애까지 일으켜 인간 건강에 해를 입히게 된다.If the environment is poor, the problem caused by odor that is not solved by a simple deodorizing filter is very serious. When a person comes in contact with odors or VOCs (volatile organic compounds: aromatic compounds, alcohols, hydrocarbons, organic acids, ketones, aldehydes, etc.), they can cause mild headaches and severe central nervous system disorders. It will harm your health.
더욱이 이러한 악취는 대기 중에 방출되었을 경우 공기 중에 잔류하는 질소산화물과 반응하여 광학적 산화반응(photo-oxidation process)에 의해 오존(O3)을 생성하게 되어 대기 오염의 문제를 일으키게 된다.Moreover, when the odor is released into the atmosphere, it reacts with nitrogen oxide remaining in the air to generate ozone (O 3 ) by an optical photo-oxidation process, which causes air pollution.
이러한 VOCs를 제거하기 위한 제어기술로는, 소각(열 및 촉매), 유기용제를회수하기 위한 흡착법, 흡수법, 응축법 이외에도 신기술인 막분리, 자외선 산화법, 코로나 기술 등이 있지만 이들은 대부분 대용량으로 비용이나 규모, 운영 면에서 가정 등의 좁은 공간 내의 공조기에 적용하기에는 곤란한 점이 있다.Control techniques to remove these VOCs include incineration (heat and catalyst), adsorption for organic solvent recovery, absorption, and condensation, as well as new technologies such as membrane separation, ultraviolet oxidation, and corona. However, in terms of size and operation, it is difficult to apply to air conditioners in narrow spaces such as homes.
따라서 가정 내에서의 VOCs 등의 처리는 환기 및 후드를 사용한 국소 배기등의 소극적 방법과 활성탄을 이용한 흡착 및 흡수액을 이용하는 기술 등이 적용되고 있으며 이 중 흡착법에 의한 필터류가 가장 많이 사용되는 실정이다.Therefore, the treatment of VOCs, etc. in the home has been applied passive methods such as local exhaust using ventilation and hood, and technology using adsorption and absorption liquid using activated carbon, among which filters by the adsorption method are most frequently used.
그러나 흡착법을 이용하는 필터는 VOCs의 농도가 낮은 경우에는 어느 정도효율적이나 VOCs의 농도가 높은 경우에는 그 기능을 충분히 수행할 수 없으며, 이러한 필터는 수명이 짧아 필터를 자주 교체해야 하는 불편함과 아울러 유지비가 많이 소요된다는 단점이 있다.However, the filter using the adsorption method is somewhat efficient when the concentration of VOCs is low, but when the concentration of VOCs is high, the function cannot be fully performed. Such a filter has a short lifespan, which makes it necessary to replace the filter frequently and maintains a maintenance cost. It takes a lot of disadvantages.
본 발명은 전술한 문제점을 해결하기 위한 것으로, 본 발명의 목적은 공조기의 필터로서, 탄소 나노 튜브를 포함하고, 상기 탄소 나노 튜브에는 적어도 한 종류 이상의 나노 사이즈 금속 입자가 고착되어 있는 것을 특징으로 하는 탄소 나노 튜브를 이용하는 필터를 제공하고자 하는 것이다.The present invention is to solve the above problems, an object of the present invention is a filter of an air conditioner, comprising a carbon nanotube, characterized in that at least one or more kinds of nano-size metal particles are fixed to the carbon nanotubes It is to provide a filter using carbon nanotubes.
또한 본 발명의 다른 목적은 공조기의 필터로서, 폴리머; 및 상기 폴리머에 분산되는 탄소 나노 튜브; 를 포함하고, 상기 탄소 나노 튜브에는 적어도 한 종류 이상의 나노 사이즈 금속 입자가 고착되어 있는 것을 특징으로 하는 탄소 나노 튜브를 이용하는 필터를 제공하고자 하는 것이다.In addition, another object of the present invention is a filter of an air conditioner, a polymer; And carbon nanotubes dispersed in the polymer; To include, wherein the carbon nanotubes to provide a filter using a carbon nanotubes, characterized in that at least one or more kinds of nano-size metal particles are fixed.
본 발명의 다른 목적 및 장점들은 하기에 설명될 것이며, 본 발명의 실시에의해 알게 될 것이다. 또한, 본 발명의 목적 및 장점들은 특허 청구 범위에 나타낸수단 및 조합에 의해 실현될 수 있다.Other objects and advantages of the invention will be described below and will be appreciated by the practice of the invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the claims.
도1은 집진용 여과지 필터와 함께 탈취 필터가 공조기 내에 설치된 구조를 나타낸 것이다.Figure 1 shows a structure in which the deodorizing filter is installed in the air conditioner together with the filter paper filter for dust collection.
도2a는 탄소 나노 튜브의 구조를 나타내는 것이다.Figure 2a shows the structure of the carbon nanotubes.
도2b는 탄소 나노 튜브의 결합체의 종류를 나타낸 것이다.Figure 2b shows the type of the combination of carbon nanotubes.
도3은 활성탄 필터와 본 발명에 따른 탄소 나노 튜브를 이용한 필터의 성능을 비교한 실험 결과이다.3 is an experimental result comparing the performance of the activated carbon filter and the filter using a carbon nanotube according to the present invention.
도4a는 전기방전법(arc-discharge)에 의해 탄소나노튜브에 금속입자를 고착시키는 방법을 나타낸 것이다.Figure 4a shows a method of fixing the metal particles to the carbon nanotubes by an arc discharge (arc-discharge).
도4b는 레이저 증착법(laser vaporization)에 의해 탄소나노튜브에 금속입자를 고착시키는 방법을 나타낸 것이다.Figure 4b shows a method of fixing the metal particles to the carbon nanotubes by laser vaporization (laser vaporization).
도5는 탄소나노튜브에 금속입자가 고착되어 있는 것을 나타낸 것이다.Figure 5 shows that the metal particles are fixed to the carbon nanotubes.
상기 목적을 달성하기 위한 본 발명은, 공조기의 필터로서, 탄소 나노 튜브를포함하고, 상기 탄소 나노 튜브에는 적어도 한 종류 이상의 나노 사이즈 금속 입자가 고착되어 있는 탄소 나노 튜브를 이용하는 필터를 제공함으로써 달성된다.The present invention for achieving the above object is achieved by providing a filter using a carbon nanotube as a filter of an air conditioner, wherein the carbon nanotube is fixed to at least one kind of nano-size metal particles. .
바람직하게는 상기 금속 섬유는 살균 기능을 갖는 금속 섬유, 공기 중의 냄새를 제거하는 기능을 갖는 금속 섬유, 공기 중의 휘발성유기화합물(VOCs)을 제거하는 기능을 갖는 금속 섬유 각각을 포함하거나 이들을 혼합한 것을 포함하도록 한다.Preferably, the metal fiber includes a metal fiber having a sterilizing function, a metal fiber having a function of removing odors in the air, and a metal fiber having a function of removing volatile organic compounds (VOCs) in the air, or a mixture thereof. Include it.
상기 금속 섬유는 유입 공기를 살균하는 은(Ag), 알루미늄(Al), 구리(Cu), 철(Fe), 아연(Zn), 카드뮴(Cd), 팔라듐(Pd), 로듐(Rh), 크롬(Cr) 재질, 공기 중의 휘발성유기화합물(VOCs)을 제거하는 구리(Cu), 백금(Pt), 니켈(Ni) 재질, 공기 중의 냄새를 제거하는 산화티탄(TiO2), 바나듐(V), 아연(Zn), 금(Au) 또는 이들의 혼합을 포함하도록 하여 집진 기능 이외에 살균 기능 등을 부가적으로 가지도록 한다.The metal fiber is silver (Ag), aluminum (Al), copper (Cu), iron (Fe), zinc (Zn), cadmium (Cd), palladium (Pd), rhodium (Rh), chromium to sterilize the inlet air (Cr) material, copper (Cu) to remove volatile organic compounds (VOCs) from air, platinum (Pt), nickel (Ni) materials, titanium oxide (TiO 2 ) to remove odors from air, vanadium (V), Zinc (Zn), gold (Au) or a mixture thereof is included to have a sterilization function in addition to the dust collection function.
본 발명의 다른 실시예에 따르면, 공조기의 필터로서, 폴리머; 및 상기 폴리머에 분산되는 탄소 나노 튜브; 를 포함하고, 상기 탄소 나노 튜브에는 적어도 한 종류 이상의 나노 사이즈 금속 입자가 고착되어 있는 것을 특징으로 한다.According to another embodiment of the present invention, a filter of an air conditioner includes a polymer; And carbon nanotubes dispersed in the polymer; It includes, characterized in that at least one or more kinds of nano-size metal particles are fixed to the carbon nanotubes.
바람직하게는 상기 금속 섬유는 살균 기능을 갖는 금속 섬유, 공기 중의 냄새를 제거하는 기능을 갖는 금속 섬유, 공기 중의 휘발성유기화합물(VOCs)을 제거하는 기능을 갖는 금속 섬유 각각을 포함하거나 이들을 혼합한 것을 포함하도록 한다.Preferably, the metal fiber includes a metal fiber having a sterilizing function, a metal fiber having a function of removing odors in the air, and a metal fiber having a function of removing volatile organic compounds (VOCs) in the air, or a mixture thereof. Include it.
상기 금속 섬유는 유입 공기를 살균하는 은(Ag), 알루미늄(Al), 구리(Cu), 철(Fe), 아연(Zn), 카드뮴(Cd), 팔라듐(Pd), 로듐(Rh), 크롬(Cr) 재질, 공기 중의 휘발성유기화합물(VOCs)을 제거하는 구리(Cu), 백금(Pt), 니켈(Ni) 재질, 공기 중의 냄새를 제거하는 산화티탄(TiO2), 바나듐(V), 아연(Zn), 금(Au) 또는 이들의 혼합을 포함하도록 하여 집진 기능 이외에 살균 기능 등을 부가적으로 가지도록 한다.The metal fiber is silver (Ag), aluminum (Al), copper (Cu), iron (Fe), zinc (Zn), cadmium (Cd), palladium (Pd), rhodium (Rh), chromium to sterilize the inlet air (Cr) material, copper (Cu) to remove volatile organic compounds (VOCs) from air, platinum (Pt), nickel (Ni) materials, titanium oxide (TiO 2 ) to remove odors from air, vanadium (V), Zinc (Zn), gold (Au) or a mixture thereof to be included to have a sterilization function in addition to the dust collection function.
이하, 첨부된 도면을 참조로 본 발명의 바람직한 실시예를 상세히 설명하기로한다. 이에 앞서, 본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이거나 사전적인 의미로 한정해서 해석되어서는 아니 되며, 발명자는 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원리에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.
따라서, 본 명세서에 기재된 실시예와 도면에 도시된 구성은 본 발명의 가장바람직한 실시예에 불과할 뿐이고 본 발명의 기술적 사상을 모두 대변하는 것은 아니므로, 본 출원 시점에 있어서 이들을 대체할 수 있는 다양한 균등물과 변형예들이 있을 수 있음을 이해하여야 한다.Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.
신소재라 불리우는 탄소 나노 튜브(Carbon Nanotube; CNT)는 지구상에 다량으로 존재하는 탄소로 이루어진 탄소동소체로서 하나의 탄소가 다른 탄소원자와 육각형 벌집무늬로 결합되어 튜브형태를 이루고 있는 물질이며, 튜브의 직경이 나노미터 수준으로 극히 작은 영역의 물질이다.Carbon nanotubes (CNTs), called new materials, are carbon allotrope composed of carbon present in a large amount on the earth, and are materials in which a single carbon is combined with other carbon atoms in hexagonal honeycomb pattern to form a tube. This is an extremely small area of material at the nanometer level.
도2a는 탄소 나노 튜브의 구조를 나타내고 있다. 도면에 도시된 바와 같이 탄소 나노 튜브는 실제로 그래파이트 면(graphite sheet)이 나노 크기의 직경으로 둥글게 말린 상태이며, sp2결합 구조를 가진다.2A shows the structure of carbon nanotubes. As shown in the figure, the carbon nanotubes actually have a graphite sheet rounded to a nano size diameter and have a sp 2 bond structure.
또한 도2b는 탄소결합체의 종류를 나타낸 것이다. 도면에 도시된 바와 같이 탄소 나노 튜브는 벽을 이루고 있는 결합수에 따라서 단일벽 나노 튜브(single walled nanotube) 또는 다중벽 나노 튜브(multiwalled nanotube)로 구분하고, 아울러 단일벽 나노 튜브가 여러 개로 뭉쳐있는 형태를 다발형 나노 튜브(rope nanotube)라고 한다.Figure 2b also shows the kind of carbon binder. As shown in the drawing, the carbon nanotubes are divided into single walled nanotubes or multiwalled nanotubes according to the number of bonds constituting the wall. The shape is called a bundle nanotube.
탄소 나노 튜브는 직경이 nm로서, 수 내지 수십nm를 갖고 그 길이가 대강0.1~10μm로 튜브 상의 형태를 하고 있다. 이와 같은 탄소 나노 튜브는 104m2/g 정도의 표면적을 갖고, 중공부를 포함하며 그 비표면적의 증가로 인해, 탄소 나노 튜브의 사용은 필터의 흡착 효율을 높이고 필터로서의 컴팩트화와 필터 수명을 길게 하는 데에 유리하다.Carbon nanotubes have a diameter of nm, several to several tens of nm, and a length of about 0.1 to 10 μm in the shape of a tube. Such carbon nanotubes have a surface area of about 10 4 m 2 / g, include hollow portions, and due to the increase in their specific surface area, the use of carbon nanotubes improves the adsorption efficiency of the filter, and the compactness and filter life of the filter. It is advantageous to lengthen.
종래의 활성탄 탈취필터와 본 발명의 탄소 나노 튜브를 이용하는 필터와의 흡착 성능 비교 시험을 행하였다.The adsorption performance comparison test of the conventional activated carbon deodorization filter and the filter using the carbon nanotube of this invention was done.
가스 크로마토그래피로 HP5890 series Ⅱ를 사용하고, 컬럼(DB-1: 직경0.53m, 길이 3m)의 내부에 시료 필터를 배치하여, 이동상으로 2ml/min의 질소 가스를 공급하였다. blank의 경우에는 벤젠, 에틸 아세테이트 및 톨루엔 3μl로 실험하였으며, 활성탄과 탄소 나노 튜브의 경우에는 각각 20μl로 실험하였다.HP5890 series II was used for gas chromatography, and the sample filter was arrange | positioned inside the column (DB-1: diameter 0.53 m, length 3 m), and 2 ml / min of nitrogen gas was supplied to the mobile phase. In the case of blank, experiments were conducted with 3μl of benzene, ethyl acetate and toluene, and 20μl for activated carbon and carbon nanotubes, respectively.
일정 시간 경과 후, 밀폐된 실내에 잔존하는 벤젠, 에틸 아세테이트 및 톨루엔의 함유량을 FID로 측정하였다. 이 때 컬럼 입구 측의 온도는 200℃, 컬럼 내부는 30℃(5min)-100℃(10/min)이며, 출구 측은 250℃이었다.After a certain time, the content of benzene, ethyl acetate and toluene remaining in the closed room was measured by FID. At this time, the temperature at the column inlet was 200 ° C, the column was 30 ° C (5 min) -100 ° C (10 / min), and the outlet side was 250 ° C.
도3은 blank, 활성탄 필터와 탄소 나노 튜브 필터의 성능을 비교한 실험 결과를 나타낸 그래프이다. 활성탄 필터와 탄소 나노 튜브 필터의 경우는 4시간 경과 후에는 벤젠, 에틸 아세테이트 및 톨루엔이 실질적으로 검출되지 않았다.3 is a graph showing experimental results comparing the performance of a blank, activated carbon filter and carbon nanotube filter. In the activated carbon filter and the carbon nanotube filter, benzene, ethyl acetate and toluene were substantially not detected after 4 hours.
그러나 표1에서 알 수 있는 바와 같이 시간대 별 벤젠, 에틸 아세테이트, 톨루엔의 농도 변화는 활성탄 필터와 탄소 나노 튜브 필터의 경우에 큰 차이가 있음을 알 수 있다.However, as can be seen in Table 1, the concentration changes of benzene, ethyl acetate, and toluene for each time zone can be seen that there is a big difference between the activated carbon filter and the carbon nanotube filter.
한편 탄소 나노 튜브의 비율이 너무 높은 경우 원가가 상승하게 되며, 너무 적을 경우에는 탈취 등의 기능이 저하되므로 폴리프로필렌과 같은 폴리머에 적당량의 탄소 나노 튜브를 분산시켜 필터를 제조할 수 있다.On the other hand, if the ratio of carbon nanotubes is too high, the cost increases, and if too small, deodorization and the like are deteriorated, so that a filter can be prepared by dispersing an appropriate amount of carbon nanotubes in a polymer such as polypropylene.
아울러 탄소 나노 튜브 기공 내에 고착되는 금속 입자는 필터 내로 유입되는VOCs를 제거하도록 나노 사이즈의 구리(Cu), 백금(Pt) 또는 니켈(Ni) 입자를 포함하도록 하여 필터의 유해 물질 제거 기능을 강화하도록 한다. 이외에도 필터 내로유입되는 공기를 살균하도록 나노 사이즈의 은(Ag), 알루미늄(Al), 구리(Cu), 철(Fe), 아연(Zn), 카드뮴(Cd), 팔라듐(Pd), 로듐(Rh) 또는 크롬(Cr) 입자 또는 필터의탈취 기능을 강화하도록 나노 사이즈의 산화티탄(TiO2), 바나듐(V), 아연(Zn) 또는금(Au) 입자를 포함할 수 있다.In addition, the metal particles stuck in the carbon nanotube pores may include nano-sized copper (Cu), platinum (Pt), or nickel (Ni) particles to remove VOCs entering the filter to enhance the filter's removal of harmful substances. do. In addition, nano-sized silver (Ag), aluminum (Al), copper (Cu), iron (Fe), zinc (Zn), cadmium (Cd), palladium (Pd), and rhodium (Rh) to sterilize the air flowing into the filter. Nano-size titanium oxide (TiO 2 ), vanadium (V), zinc (Zn) or gold (Au) particles to enhance the deodorizing function of the chromium (Cr) particles or the filter.
나노 금속 입자의 탄소 나노 튜브로의 고착은 전기방전법(arc-discharge) 또는 레이저 증착법(laser vaporization) 등에 의해 이루어진다.Adhesion of the nano metal particles to the carbon nanotubes is performed by arc-discharge or laser vaporization.
전기방전법(arc-discharge)은 도4a에 도시된 바와 같이, 두 개의 전극으로 그래파이트 막대를 사용하여, 두 전극 사이에서 방전이 일어나면 양극으로 사용된 그래파이트 막대에서 떨어져 나온 탄소 크러스트들이 낮은 온도로 유지되고 있는 음극 그래파이트 막대에 응축된다. 이렇게 음극에서 응축된 그래파이트는 탄소나노튜브와 탄소나노 파티클(particle)을 포함하고 있는데 본 발명에 의한 기능성 탄소필터를 제조하기 위한 방법은 순수한 양극 그래파이트 막대에 구멍을 뚫고 Ag, Cu, Co, Ni. Fe, Y등의 금속파우더를 채우고 합성시키면 단중벽 기능성 탄소나노튜브를얻을 수 있게 된다.The arc-discharge is performed by using a graphite rod with two electrodes, as shown in FIG. 4A, so that when the discharge occurs between the two electrodes, the carbon crusts separated from the graphite rod used as the anode are kept at a low temperature. Condensation on the cathode graphite rod being formed. The graphite condensed in the cathode comprises carbon nanotubes and carbon nanoparticles (particle), the method for producing a functional carbon filter according to the present invention is a hole in the pure anode graphite rods Ag, Cu, Co, Ni. Filling and synthesizing the metal powders such as Fe and Y, it is possible to obtain a single-wall functional carbon nanotubes.
도4b에 도시된 것과 같은 레이저 증착법(laser vaporization)은 반응로를 1200℃ 정도로 유지시킨 후, 반응로 내부에 있는 그래파이트 타게트에 레이저를 쪼여서그래파이트를 기화시킨다. 타게트에서 기화된 그래파이트는 차가운 콜렉터(collector)에서 흡착되는데, 이와 같이 얻어진 응축물질에는 다중벽 탄소나노튜브와 탄소나노입자가 섞여 있다. 이때 운반 가스로는 헬륨이나 아르곤 가스가 사용되고 반응로의 압력은 500 Torr 정도로 유지한다. 본 발명에 의한 기능성 탄소필터를 제조를 위해서는 순수한 그래파이트 타게트 대신에 Ag, Cu, Co, Ni. Fe등이 혼합된 그래파이트를 타게트로 사용하면 균일한 단중벽 탄소나노튜브를 얻을 수 있다.Laser vaporization as shown in FIG. 4B maintains the reactor at about 1200 ° C., and then vaporizes the graphite by subjecting the graphite target to the inside of the reactor. Graphite vaporized in the target is adsorbed in a cold collector, and the condensate thus obtained is a mixture of multi-walled carbon nanotubes and carbon nanoparticles. At this time, helium or argon gas is used as the carrier gas and the pressure of the reactor is maintained at about 500 Torr. In order to manufacture a functional carbon filter according to the present invention, Ag, Cu, Co, Ni. By using graphite mixed with Fe as a target, uniform single-walled carbon nanotubes can be obtained.
도5는 상기의 방법 등에 의해 탄소나노튜브에 금속입자가 고착되어 있는 것을나타낸다.5 shows that the metal particles are fixed to the carbon nanotubes by the above method or the like.
이상과 같이, 본 발명은 비록 한정된 실시예와 도면에 의해 설명되었으나, 본 발명은 이것에 의해 한정되지 않으며 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술 사상과 아래에 기재될 특허 청구범위의 균등 범위 내에서 다양한 수정 및 변형이 가능함은 물론이다.As mentioned above, although this invention was demonstrated by the limited embodiment and drawing, this invention is not limited by this, The person of ordinary skill in the art to which this invention belongs, Of course, various modifications and variations are possible within the scope of equivalent claims.
이상에서 상세히 설명한 바와 같이, 본 발명에 따른 탄소 나노 튜브를 이용하는 필터는 두께를 얇게 하여도 그 표면적이 넓어 탈취 기능이 우수하므로, 콤팩트한 필터를 제공할 수 있게 된다.As described in detail above, the filter using the carbon nanotubes according to the present invention has a wide surface area even when the thickness is thin, and thus has excellent deodorizing function, thereby providing a compact filter.
또한 탄소 나노 튜브는 300℃이상의 온도에서 흡착한 물질을 탈착시키는 등 간단한 열적, 화학적 처리에 의해 재생이 가능하므로 필터를 자주 교환하게 되는 번거로움과 비용 면에서의 문제점이 해결된다.In addition, carbon nanotubes can be regenerated by a simple thermal and chemical treatment such as desorption of the adsorbed material at a temperature of 300 ° C. or higher, thereby eliminating the trouble and cost of frequently replacing the filter.
한편 탄소 나노 튜브를 이용하여 치밀한 층이 형성된 필터의 경우에는 먼지와 같은 고체 미립자도 흡착하여 집진 필터로서의 기능을 하게 되므로 공조기 내에 별도의 집진 필터 없이 탄소 나노 튜브 필터만 설치하는 것이 가능하므로 필터의 유지 및 관리가 용이하게 된다.On the other hand, in the case of a filter having a dense layer formed using carbon nanotubes, it also functions as a dust collecting filter by adsorbing solid particles such as dust, so that only the carbon nanotube filter can be installed in the air conditioner without a separate dust collecting filter. And management becomes easy.
아울러 공조기가 사용되는 환경에 따라 탄소 나노 튜브의 기공 내에 VOCs 제거를 돕는 니켈, 살균력을 제공하는 은, 탈취 성능을 강화시키는 산화티탄 입자 는 이들을 혼합하여 고착시킴으로써 별도의 처리 시설이나 필터 없이도 효율적인 공기 정화가 가능하도록 하는 이점이 있다.In addition, depending on the environment in which the air conditioner is used, nickel to help remove VOCs in the pores of carbon nanotubes, silver to provide bactericidal power, and titanium oxide particles to enhance deodorizing performance are mixed and fixed to efficiently clean air without a separate treatment facility or filter. There is an advantage to make this possible.
즉 본 발명에 따른 탄소 나노 튜브를 이용하는 필터는 얇은 두께로도 효율적으로 정화된 실내 공기를 제공할 수 있으며, 간단한 처리에 의해 재생이 가능하므로비용 면에서 절약되고, 집진필터를 별도로 설치하지 않아도 되므로 필터의 유지 및관리가 용이하며, 탄소 나노 튜브에는 적어도 한 종류 이상의 나노 사이즈 금속 입자가 고착되도록 하여 별도의 장치 없이도 필터가 VOCs 등의 유해 물질도 효율적으로 제거할 수 있도록 하여, 궁극적으로 공조기를 콤팩트하게 제조할 수 있다는 이점이 있다.That is, the filter using the carbon nanotubes according to the present invention can provide the purified indoor air efficiently even with a thin thickness, and can be regenerated by a simple treatment, thereby saving on cost and eliminating the need to install a dust filter separately. The filter is easy to maintain and manage, and the carbon nanotubes allow at least one type of nano-size metal particles to adhere to each other so that the filter can efficiently remove harmful substances such as VOCs without a separate device, thereby ultimately compacting the air conditioner. There is an advantage that can be manufactured.
Claims (17)
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KR1020020082683A KR100648952B1 (en) | 2002-12-23 | 2002-12-23 | Filter Using Carbon Nano Tubes |
CNA031073905A CN1509794A (en) | 2002-12-23 | 2003-03-25 | Filter of applied carbon nanometer tube |
US10/672,064 US7074260B2 (en) | 2002-12-23 | 2003-09-29 | Filter using carbon nanotube |
EP03256500A EP1439147A1 (en) | 2002-12-23 | 2003-10-15 | Filter using carbon nanotube |
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CN1509794A (en) | 2004-07-07 |
KR100648952B1 (en) | 2006-11-24 |
US20040131811A1 (en) | 2004-07-08 |
EP1439147A1 (en) | 2004-07-21 |
US7074260B2 (en) | 2006-07-11 |
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